Miner&#39;s pick.



No. 759,704. PATENTED MAY 10, 1904. M HARDSOGG MINERS PICK.

APPLICATION 121mm MAY 2, 1903.

N0 MODEL.

UNITED STATES Patented May 10, 1904.

PATENT OFFIC '3.

MINERS PICK.

SPECIFICATION forming part of Letters Patent No. 759,704, dated May 10, 1904:.

Application filed May 2, 1903. Serial No. 15531 (No model.)

Be it known that l, MARTIN HARDSOCG, a citizen of the United States of America, and a resident of Ottumwa,VVapello county, Iowa, have invented a new anduseful Miners Pick, of which the following is a specification.

The object of this invention is to provide means for removably and replaceably connecting a miners pick to a handle, stem, or shank.

My invention consists in the construction, arrangement, and combination of elements hereinafter set forth,pointed outin my claims, and illustrated by the accompanying drawings, in which Figure 1 is an elevation of the complete device. Fig. 2is a view, partly in section, illustrating the construction of the means employed to connect the stem and pick. Fig. 3 is a sectional view on the indicated line 3 30f Fig. 1. Fig. 1 is a perspective of the eccentric lock detached from the other parts.

In the construction of the device as shown the numeral designates a stem, haft, shank, or socket, which is formed with a recess 1.1 longitudinally of one end portion for the reception of a handle 12, the latter preferably made of wood. The rear end portion of the stem containing the recess 11 preferably is oval in cross-section, and the forward portion of said stem preferably is relatively broad and Hat and formed with a transverse recess or eye 13, extending from side to side thereof and of a size to admit a pick 14, hereinafter described.

The pick 1 1 may be any of the conventional forms, preferably rectangular in cross-section and tapering from a rectangular central portion to points at either end. On one side and at its central portion 15 the pick 14 is serrated or roughened, and a corresponding serrated or roughened surface 16 is formed on the inner face of the outer end portion of the stem 10. Holes 17 are formed in the stem 10 and communicate with the recess 13 therein, and a circular lock 18 is mounted eccentrically for rotary adjustment in said holes, the body of said lock contained in the rear portion of the recess. The lock 18 is formed with a central axial aperture 19, square or other wise angular in cross-section. Holes 20 are formed in the stem 10,and holes-21 are formed in the lock 18 and arranged for registration at times with the holes 20 for the reception of a key, nail, pin, or similar device for holding the lock stationary relative to the stem. Then the lock is turned into the position shown by dotted lines in Fig. 2, the pick 14 is inserted and seated in the recess 13 by endwise movement and the roughened portion 15 of the pick is brought into position opposite the serrated face 16 of the end portion of the stem. Then the lock 18 is rotated, preferably by the insertion therein of the point of another pick, into the position shown by solid lines in Fig. 2, thus causing the periphery of the lock to engage the pick 14: and seat the same firmly in the recess. Then the pick may be employed for any desired purpose and the eccentrically-positioned lock will hold and firmly seat the tool 14: in the stem.

The parts being subject to wear and at times to severe strain, it may occur that the pick 14; will become loose in the stem by the accidental rotation of the eccentrically-mounted lock, and to obviate such, difliculty l, have provided the pin-holes 20 and 21 and the pin 22, which pin may be an ordinary nail or peg of wood or other material of inconsiderable cost.

The tool 14 may be removed from the stern by endwise movement upon a reverse movement of the lock 18 into the position shown by dotted lines in Fig. 2, such reverse movement also being accomplished, preferably, by the use of the point of a pick in the angular aperture 19 of the lock.

1 claim as my invention- 1. The eyeless miners pick, comprising the stem formed with a recess, a pick-blade mounted in the recess, and an eccentrically-mounted lock Wholly in the recess and arranged for rotation into engagement with the pick-blade at times.

2. The eyeless miners pick, comprising the stem formed with a recess, a pick-blade removable and replaceable in said recess by endwise movement, a lock mounted eccentrically for rotary adjustment in said stem and arranged for engagement with said pick-blade at times, said lock formed with an angular axial aperture to receive a rotating means, and a handle attached to said stem.

3. The eyeless miners pick, comprising the stem, the handle attached thereto, the pickblade removably and replaceably mounted in the stem and the eccentrically-mounted lock and trunnions thereon journaled in said stem said lock arranged for engagement with the pick-blade.

4. The eyeless miners pick, comprising the stem, the handle attached to said stem, the

and mounted in said transverse recess of the stem, and the eccentrically-mounted lock and trunnions thereon journaled in said stem, said lock formed with an angular aXial aperture arranged for engagement with said pick-blade at times, whereby the roughened surface of the pick-blade is brought into interlocking engagement with the serrated portion of the stem.

6. The miners pick, comprising the stem formed with a recess and apertures opening to and on opposite sides of said recess, a pick mounted through said recess, a circular lock in said recess and eccentric trunnions on said lock and journaled in the stem, and means for locking said lock against rotation.

Signed by me at Ottumwa, Iowa, day of February, 1903.

MARTIN HARDSOGG.

this 28th Witnesses:

E. J. LAMBERT, HELEN LOTSPEICH. 

